<template>
  <div class="avatar-container" @click="editImage()">
    <el-dialog
      :title="title"
      :model-value="dialogVisibleCorpper"
      width="800px"
      append-to-body
      @opened="openDialog"
      :before-close="beforeClose"
    >
      <el-row>
        <el-col :span="12" style="height: 300px">
          <vue-cropper
            ref="cropper"
            :img="options.img"
            :info="true"
            :autoCrop="options.autoCrop"
            :autoCropWidth="options.autoCropWidth"
            :autoCropHeight="options.autoCropHeight"
            :fixedBox="options.fixedBox"
            :outputType="options.outputType"
            :enlarge="4"
            @realTime="realTime"
            v-if="showCropper"
          />
        </el-col>
        <el-col :span="12" style="height: 300px">
          <div class="preview-box">
            <img v-if="previews.url" :src="previews.url" :style="previews.img" style="object-fit: contain" />
            <span v-else></span>
          </div>
        </el-col>
      </el-row>
      <el-row style="margin-top: 12px">
        <el-col :span="12">
          <el-row>
            <el-col :span="8">
              <el-upload action="#" :http-request="() => {}" :before-upload="beforeUpload" :show-file-list="false">
                <el-button>选择</el-button>
              </el-upload>
            </el-col>
            <el-col :span="4">
              <el-button :icon="Plus" @click="changeScale(1)"></el-button>
            </el-col>
            <el-col :span="4">
              <el-button :icon="Minus" @click="changeScale(-1)"></el-button>
            </el-col>
            <el-col :span="4">
              <el-button :icon="RefreshLeft" @click="rotateLeft()"></el-button>
            </el-col>
            <el-col :span="4">
              <el-button :icon="RefreshRight" @click="rotateRight()"></el-button>
            </el-col>
          </el-row>
        </el-col>
        <el-col :span="4" :offset="8" style="margin-left: 22.3%">
          <el-button type="primary" @click="determine()">提 交</el-button>
        </el-col>
      </el-row>
    </el-dialog>
  </div>
</template>

<script setup lang="ts">
import { Plus, Minus, RefreshLeft, RefreshRight } from "@element-plus/icons-vue";
import { ElMessage } from "element-plus";
import "vue-cropper/dist/index.css";
import { VueCropper } from "vue-cropper";
import { getCurrentInstance, ref, reactive } from "vue";

const { proxy } = getCurrentInstance();
const props = defineProps({
  dialogVisibleCorpper: {
    type: Boolean,
    default: false
  },
  title: {
    type: String,
    default: "上传图片"
  }
});
const showCropper = ref(false);
// cropper配置  更多配置可参考 https://www.npmjs.com/package/vue-cropper
const options = reactive({
  img: "https://gw.alipayobjects.com/zos/antfincdn/FLrTNDvlna/antv.png", // 裁剪图片的地址
  autoCropWidth: 200, // 默认生成截图框宽度 默认容器的 80%
  autoCropHeight: 200, // 默认生成截图框高度 默认容器的 80%
  outputType: "png", // 裁剪生成图片的格式 jpeg, png, webp
  autoCrop: true, // 是否默认生成截图框
  fixedBox: false // 固定截图框大小
});
const previews = ref({
  url: "",
  img: ""
});

// 打开裁剪弹窗
const openDialog = () => {
  showCropper.value = true;
};
// 修改图片大小 正数为变大 负数变小
const changeScale = num => {
  num = num || 1;
  proxy.$refs.cropper.changeScale(num);
};
// 向左边旋转90度
const rotateLeft = () => {
  proxy.$refs.cropper.rotateLeft();
};
// 向右边旋转90度
const rotateRight = () => {
  proxy.$refs.cropper.rotateRight();
};
// 上传图片处理
const beforeUpload = rawFile => {
  if (rawFile.type.indexOf("image/") == -1) {
    ElMessage.error("请上传图片类型文件!");
    return false;
  }
  if (rawFile.size / 1024 / 1024 > 2) {
    ElMessage.error("文件大小不能超过2MB!");
    return false;
  }
  const reader = new FileReader();
  reader.readAsDataURL(rawFile);
  reader.onload = () => {
    // 图片在这里
    options.img = reader.result;
  };
};
// 实时预览事件
const realTime = data => {
  previews.value = data;
};

const emit = defineEmits(["update:dialogVisibleCorpper", "confirm"]);

// 关闭弹窗
const beforeClose = () => {
  options.img = null;
  previews.value.url = "";
  emit("update:dialogVisibleCorpper", false);
};
// 提交图片
const determine = () => {
  options.img = null;
  previews.value.url = "";
  emit("confirm");
};
</script>

<style lang="scss" scoped>
// 去除img默认的max-width否则预览会发生偏移
img {
  max-width: none !important;
}
.avatar-container {
  .img-box {
    border-radius: 50%;
    border: 1px solid #ccc;
    width: 10vw;
    height: 10vw;
  }
}
.preview-box {
  position: absolute;
  top: 50%;
  transform: translate(50%, -50%);
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 1px solid #ccc;
  overflow: hidden;
}
</style>
